This is a summary of the video:
The video is about the life of Ying Zheng, the first emperor of China, who unified the six kingdoms and founded the Qin dynasty. The narrator, Doc Li, tries to solve four mysteries about Ying Zheng's family background, using historical records and archaeological evidence. He claims that Ying Zheng was not the son of Lv Buwei, a merchant and prime minister of Qin, but of Ziyi, a prince of Qin who was once a hostage in Zhao. He also claims that Ying Zheng had a brother named Chengjiao, who was the son of Ziyi and a princess of Han, and that Ying Zheng had an uncle named Chang Pingjun, who was the son of a king of Chu and a princess of Qin. He further claims that Ying Zheng had a wife who was also a princess of Chu, and that she was the mother of his eldest son Fu Su. He argues that Ying Zheng's family relationships influenced his political decisions and his fate. He says that Ying Zheng was torn between Qin and Chu, the two most powerful kingdoms in ancient China, and that he tried to achieve peace with Chu by choosing Fu Su as his successor. However, his plan was foiled by Zhao Gao, a eunuch who changed his order and made Hu Hai, his younger son, the new emperor. Hu Hai then ordered Fu Su to commit suicide and started a series of rebellions that led to the downfall of the Qin dynasty. The narrator concludes that Ying Zheng was a lonely and miserable emperor who tried to heal his childhood trauma with his life.
Here are the key facts extracted from the text:
1. The text is about the life of Ying Zheng, the first emperor of Qin who unified China.
2. Ying Zheng was born to Ziyi, a prince of Qin, and Zhao Ji, a concubine of Lv Buwei, a merchant and politician.
3. Ying Zheng had a half-brother named Chengjiao, who was the son of Ziyi and a princess of Han.
4. Ying Zheng's father died when he was 13 and he became the king of Qin under the influence of his grandmother-in-law Mrs. Huayang, who was from Chu.
5. Ying Zheng's mother had an affair with Lao Ai, a strongman from Zhao, and gave birth to two sons with him.
6. Lao Ai staged a rebellion against Ying Zheng with the support of some officials from Zhao, but was defeated and killed along with his sons and Ying Zheng's mother.
7. Lv Buwei also committed suicide after being implicated in the rebellion.
8. Ying Zheng conquered six other kingdoms and became the first emperor of China at the age of 39.
9. Ying Zheng's uncle Chang Pingjun, who was also his prime minister, betrayed him and became the king of Chu with the help of Xiang Yan, a general of Chu.
10. Ying Zheng killed Chang Pingjun and Xiang Yan and destroyed Chu.
11. Ying Zheng's wife was possibly a princess of Chu and the mother of his eldest son Fu Su.
12. Ying Zheng wanted Fu Su to succeed him as the emperor and make peace with Chu, but his order was changed by Zhao Gao, a eunuch who supported his younger son Hu Hai.
13. Fu Su committed suicide after receiving the fake order and Hu Hai became the second emperor of Qin.
14. Hu Hai was a tyrant who provoked rebellions in various regions, including one led by Cheng Sheng and Wu Guang in Chu under the name of Fu Su.
15. Hu Hai was eventually killed by Zhao Gao, who was then killed by Ziying, the third emperor of Qin.
16. Qin dynasty collapsed after 15 years and was replaced by Han dynasty founded by Liu Bang, a rebel leader from Chu.